Alert archive / Pennsylvania / Winter Storm Watches in 2018
Winter Storm Watch 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this winter storm watch at Feb 5, 2018, 3:29 PM EST for Carbon County, Monroe County, Pennsylvania; Sussex County, New Jersey. It took effect at Feb 7, 2018, 6:00 AM EST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Feb 5, 2018, 3:29 PM EST (20:29 UTC)
- In effect from
- Feb 7, 2018, 6:00 AM EST
- Expired
- Feb 6, 2018, 3:37 PM EST
- In force
- Issued by
- NWS Philadelphia/Mount Holly
Counties Sussex County, NJ, Carbon County, PA, Monroe County, PA
The radar
The Philadelphia radar (KDIX), 140 km from the middle of the area, began a volume at 20:35 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.5 hours before the alert went out and 201 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 617 m above ground
- 0-6 km bulk shear
- 90 kt
- 0-1 km storm-relative helicity
- -312 m²/s²
- 0-3 km storm-relative helicity
- -202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
977 WWUS41 KPHI 052029 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 329 PM EST Mon Feb 5 2018 NJZ001-PAZ054-055-060830- /O.NEW.KPHI.WS.A.0002.180207T1100Z-180208T0500Z/ Sussex-Carbon-Monroe- Including the cities of Newton, Jim Thorpe, and Stroudsburg 329 PM EST Mon Feb 5 2018 ...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY EVENING... * WHAT...Heavy mixed precipitation possible. Potential for snow accumulations of 4 to 7 inches and ice accumulations of around one tenth. * WHERE...In New Jersey, Sussex county. In Pennsylvania, Carbon and Monroe counties. The highest snowfall accumulations will likely occur at higher elevations in the northern portion of these counties. * WHEN...Snow is expected to overspread the area from southwest to northeast around or just after daybreak Wednesday morning. The snow could be heavy at times during the morning and early afternoon. Snow will likely transition to sleet and then freezing rain from south to north sometime Wednesday afternoon. A brief changeover to rain is possible, especially at lower elevations, before precipitation tapers off Wednesday evening. * ADDITIONAL DETAILS...Plan on difficult travel conditions, including during both morning and afternoon commutes on Wednesday. Significant reductions in visibility are possible. There is still some uncertainty regarding how quickly the transition from snow to a wintry mix to even rain occurs. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Continue to monitor the latest forecasts. $$ For more information from the National Weather Service visit www.weather.gov/phi/winter JRK
3 follow-up statements
095 WWUS41 KPHI 060332 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 1032 PM EST Mon Feb 5 2018 NJZ001-PAZ054-055-061500- /O.CON.KPHI.WS.A.0002.180207T1100Z-180208T0500Z/ Sussex-Carbon-Monroe- Including the cities of Newton, Jim Thorpe, and Stroudsburg 1032 PM EST Mon Feb 5 2018 ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY EVENING... * WHAT...Heavy mixed precipitation possible. Potential for snow accumulations of 4 to 7 inches and ice accumulations of around one tenth. * WHERE...In New Jersey, Sussex county. In Pennsylvania, Carbon and Monroe counties. The highest snowfall accumulations will likely occur at higher elevations in the northern portion of these counties. * WHEN...Snow is expected to overspread the area from southwest to northeast around or just after daybreak Wednesday morning. The snow could be heavy at times during the morning and early afternoon. Snow will likely transition to sleet and then freezing rain from south to north sometime Wednesday afternoon. A brief changeover to rain is possible, especially at lower elevations, before precipitation tapers off Wednesday evening. * ADDITIONAL DETAILS...Plan on difficult travel conditions, including during both morning and afternoon commutes on Wednesday. Significant reductions in visibility are possible. There is still some uncertainty regarding how quickly the transition from snow to a wintry mix to even rain occurs. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Continue to monitor the latest forecasts. $$ For more information from the National Weather Service visit www.weather.gov/phi/winter
581 WWUS41 KPHI 060834 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 334 AM EST Tue Feb 6 2018 NJZ001-PAZ054-055-062200- /O.CON.KPHI.WS.A.0002.180207T1100Z-180208T0500Z/ Sussex-Carbon-Monroe- Including the cities of Newton, Jim Thorpe, and Stroudsburg 334 AM EST Tue Feb 6 2018 ...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH WEDNESDAY EVENING... * WHAT...Heavy mixed precipitation is possible. There is the potential for snow accumulations of 4 to 7 inches and ice accumulations of around one tenth of an inch. * WHERE...Sussex County in New Jersey and the Pennsylvania counties of Carbon and Monroe. * WHEN...Snow is expected to overspread the area from southwest to northeast around or just after daybreak on Wednesday. The snow could be heavy at times during the morning and early afternoon. Snow will likely transition to sleet, then to freezing rain from south to north on Wednesday afternoon. A brief change to rain is possible, especially in the valleys, before the precipitation comes to an end on Wednesday evening. * ADDITIONAL DETAILS...Travel will become difficult on Wednesday. If you will be driving, prepare for reduced visibility. There remains some uncertainty regarding the timing of the transition from snow to a wintry mix. The heaviest of the snowfall is expected in the elevated terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Continue to monitor the latest forecasts. $$ For more information from the National Weather Service visit www.weather.gov/phi/winter
179 WWUS41 KPHI 062037 WSWPHI URGENT - WINTER WEATHER MESSAGE National Weather Service Mount Holly NJ 337 PM EST Tue Feb 6 2018 NJZ001-PAZ054-055-070845- /O.UPG.KPHI.WS.A.0002.180207T1100Z-180208T0500Z/ /O.NEW.KPHI.WS.W.0003.180207T0900Z-180208T0200Z/ Sussex-Carbon-Monroe- Including the cities of Newton, Jim Thorpe, and Stroudsburg 337 PM EST Tue Feb 6 2018 ...WINTER STORM WARNING IN EFFECT FROM 4 AM TO 9 PM EST WEDNESDAY... * WHAT...Heavy mixed precipitation expected. Total snow accumulations of 4 to 7 inches and ice accumulations of around one tenth of an inch are expected. * WHERE...In New Jersey, Sussex County. In Pennsylvania, Carbon and Monroe Counties. * WHEN...Snow is expected to begin late tonight, becoming heavy at times Wednesday morning. Snow will mix with sleet and freezing rain Wednesday afternoon. The wintry mix may briefly transition back to snow before ending Wednesday evening. * ADDITIONAL DETAILS...Plan on very difficult travel conditions, including during the morning and evening commutes on Wednesday. Be prepared for significant reductions in visibility at times during heavy snow. Snowfall rates may exceed one inch per hour during the morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning means significant amounts of snow, sleet and ice are expected. This will make travel very hazardous or impossible. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. $$ DEZ001-MDZ008-012-NJZ013-016>019-070845- /O.NEW.KPHI.WW.Y.0006.180207T0900Z-180207T1400Z/ New Castle-Cecil-Kent MD-Western Monmouth-Salem-Gloucester-Camden- Northwestern Burlington- Including the cities of Wilmington, Elkton, Chestertown, Freehold, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, and Mount Holly 337 PM EST Tue Feb 6 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 9 AM EST WEDNESDAY... * WHAT...Snow, sleet, and freezing rain expected. Total ice accumulations of a light glaze are expected. Total snow and sleet accumulations of up to one half of an inch of snow and sleet. * WHERE...Portions of central and southern New Jersey, northeast Maryland and northern Delaware. * WHEN...Precipitation is expected to begin briefly as snow late tonight before transitioning to sleet and freezing rain during the morning commute on Wednesday. Precipitation should change to rain from south to north between 7 and 9 AM. * ADDITIONAL DETAILS...Plan on slippery road conditions, including during the morning commute on Wednesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Be prepared for slippery roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. $$ NJZ012-015-PAZ070-071-102-104-106-070845- /O.NEW.KPHI.WW.Y.0006.180207T0900Z-180207T1600Z/ Middlesex-Mercer-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of New Brunswick, Trenton, Media, Philadelphia, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 337 PM EST Tue Feb 6 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 11 AM EST WEDNESDAY... * WHAT...Mixed precipitation expected. Total snow accumulations of up to one inch and ice accumulations of a light glaze are expected. * WHERE...Portions of central and northern New Jersey and southeast Pennsylvania, including the Philadelphia metropolitan area. * WHEN...Precipitation is expected to begin as snow late tonight before transitioning to a wintry mix of sleet and freezing rain during or just after the morning commute on Wednesday. Precipitation should change to rain from southeast to northwest between 9 and 11 AM. * ADDITIONAL DETAILS...Plan on slippery road conditions for the morning commute on Wednesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Be prepared for slippery roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. $$ NJZ009-010-PAZ101-103-105-070845- /O.NEW.KPHI.WW.Y.0006.180207T0900Z-180207T1900Z/ Hunterdon-Somerset-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Flemington, Somerville, Honey Brook, Oxford, Collegeville, Pottstown, Chalfont, and Perkasie 337 PM EST Tue Feb 6 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 2 PM EST WEDNESDAY... * WHAT...Mixed precipitation expected. Total snow accumulations of up to two inches and ice accumulations of up to one-tenth inch are expected. * WHERE...Portions of northern and northwestern New Jersey and southeastern Pennsylvania. * WHEN...Precipitation is expected to begin as snow late tonight through the morning commute on Wednesday. The snow should change to sleet and freezing rain by mid morning and then to rain during the early afternoon hours. * ADDITIONAL DETAILS...Plan on slippery road conditions, including during the morning commute on Wednesday. Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Be prepared for slippery roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. $$ NJZ007-008-PAZ060>062-070845- /O.NEW.KPHI.WW.Y.0006.180207T0900Z-180208T0200Z/ Warren-Morris-Berks-Lehigh-Northampton- Including the cities of Washington, Morristown, Reading, Allentown, Bethlehem, and Easton 337 PM EST Tue Feb 6 2018 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 9 PM EST WEDNESDAY... * WHAT...Mixed precipitation expected. Total snow accumulations of 2 to 4 inches and ice accumulations of up to one-tenth inch are expected. * WHERE...The Lehigh Valley in Pennsylvania, and Warren and Morris Counties in New Jersey. * WHEN...Precipitation is expected to begin as snow late tonight and may become heavy at times during the morning commute on Wednesday. Snow will change to a wintry mix of sleet and freezing rain late in the morning and continue through the afternoon hours. Precipitation may transition to rain late in the afternoon and early evening, especially in the warmer valleys. * ADDITIONAL DETAILS...Plan on slippery road conditions, including during the morning and evening commutes on Wednesday. Be prepared for reduced visibilities at times, especially in the morning when snowfall rates of one inch per hour may occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Be prepared for slippery roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. $$ For more information from the National Weather Service visit www.weather.gov/phi/winter CMS/LR/JRK
Nearby
Winter Storm Watches in Pennsylvania, 2018Winter Storm Watches in New Jersey, 2018Every winter storm watch in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.